Like the Necromancer 5e campaign there is the possibility of additional books in the form of a Pathfinder (only, damnit!) conversion of Necromancer's 5e spell book as a $25,000 stretch goals. Speaking stretch goals they're a bit starved for this campaign with only the above Pathfinder conversion and a leather edition of the book being unlocked at $40,000.
After the survey early last month I surprised that the S&W/PF versions weren't included as stretch goal unlocked add-ons for Necromancer Games kickstarter and now we see why. The current Kickstarter has a goal of $15,000 and reward levels start at $20.00 for a pdf of your choice of system and ending at $2,000 with a nearly all-expenses paid trip to NTRPGcon in 2015 to meet and hang with the Frogs (Airfair and extra food are your job!)